1 files changed, 70 insertions, 0 deletions
diff --git a/llvm/lib/DebugInfo/Msf/MsfError.cpp b/llvm/lib/DebugInfo/Msf/MsfError.cpp
new file mode 100644
index 00000000000..246beb9b0de
--- /dev/null
+++ b/llvm/lib/DebugInfo/Msf/MsfError.cpp
@@ -0,0 +1,70 @@
+//===- MsfError.cpp - Error extensions for Msf files ------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/Msf/MsfError.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+
+using namespace llvm;
+using namespace llvm::msf;
+
+namespace {
+// FIXME: This class is only here to support the transition to llvm::Error. It
+// will be removed once this transition is complete. Clients should prefer to
+// deal with the Error value directly, rather than converting to error_code.
+class MsfErrorCategory : public std::error_category {
+public:
+  const char *name() const LLVM_NOEXCEPT override { return "llvm.msf"; }
+
+  std::string message(int Condition) const override {
+    switch (static_cast<msf_error_code>(Condition)) {
+    case msf_error_code::unspecified:
+      return "An unknown error has occurred.";
+    case msf_error_code::insufficient_buffer:
+      return "The buffer is not large enough to read the requested number of "
+             "bytes.";
+    case msf_error_code::not_writable:
+      return "The specified stream is not writable.";
+    case msf_error_code::no_stream:
+      return "The specified stream does not exist.";
+    case msf_error_code::invalid_format:
+      return "The data is in an unexpected format.";
+    case msf_error_code::block_in_use:
+      return "The block is already in use.";
+    }
+    llvm_unreachable("Unrecognized msf_error_code");
+  }
+};
+} // end anonymous namespace
+
+static ManagedStatic<MsfErrorCategory> Category;
+
+char MsfError::ID = 0;
+
+MsfError::MsfError(msf_error_code C) : MsfError(C, "") {}
+
+MsfError::MsfError(const std::string &Context)
+    : MsfError(msf_error_code::unspecified, Context) {}
+
+MsfError::MsfError(msf_error_code C, const std::string &Context) : Code(C) {
+  ErrMsg = "Msf Error: ";
+  std::error_code EC = convertToErrorCode();
+  if (Code != msf_error_code::unspecified)
+    ErrMsg += EC.message() + "  ";
+  if (!Context.empty())
+    ErrMsg += Context;
+}
+
+void MsfError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; }
+
+const std::string &MsfError::getErrorMessage() const { return ErrMsg; }
+
+std::error_code MsfError::convertToErrorCode() const {
+  return std::error_code(static_cast<int>(Code), *Category);
+}